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there are a few kinds of BH that help cars start from extreme cold weather,
7 I- w5 v5 B: a# z+ ]basically , BH keep the car warm by heating up the oil pan-which keeps the engine oil from frozen, or by heating up the coolant/radiator, and keep the engine block warm.
! K! n) J& i' H; U( l" aEither way, the engine shall not be frozen with use of BH.
: P: F; i0 o) ?4 ^; fGoogle block heater! A' o' a/ d: y/ B( f* _$ j! \
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If you do not have BH on ur car, by using synthetic oil you can also prevent oil frozen from happening.
/ w1 F6 f% A" h \% [. ^A good synthetic oil, 5w20 or 5w 30 , or 3w 20 have a pure point of -30 to -40 degrees.
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' |% O8 n+ A3 w& @if you have BH or SO, but ur car still could not be started up, and you have not checked/replaced your battary before the winter came, I bet the battary is dead. |
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